Recording instrument



y 1950 G. w. BARNES, JR., ET AL 2,508,592

RECORDING INSTRUMENT Filed Oct. 6, 1945 4 Sheets-Sheet 1 INVENTOR. GEORGE w BARNES JR. JOHN F GOETZ Y WALTER P.WILLS ATTORNEY.

FIG.

May 23, 1950 Filed Oct. 6, 1945 G. W. BARNES, JR, ET AL RECORDING INSTRUMENT 4 Sheets-Shea. 2

ATTO R N EY.

y 23, 1950 G. w. BARNES, JR., ET AL 2,508,592

RECORDING INSTRUMENT 4 Sheets-Sheet 5 Filed Oct. 6, 1945 FIG.

. INVENTOR. GEORGE W. BARNES JR JOHN F. GOETZ BY WALTER P. WILLS ATTOR NEY ay 1950 G. w. BARNES, JR., El AL 2,508,592

RECORDING INSTRUMENT 4 Sheets-Sheet 4 Filed Oct. 6, 1945 FIG.6

INVENTOR. GEORGE W. BARNES JR. JOHN F. GOETZ WALTER P WILLS ATTORNEY.

Patented May 23, 1950 gEOOBD NG INSTB'UMNT George W. Barnes, in, Clifton 116 8 1 an J91!!! F.- Qoetz and Wa vPh ladelp, ia County, :P i iznon. by :mesne assiz me ts, to .M ni opbi s lioneyw il Regulat r Gomnaov M ieapolis. a omm tion De w Application Dctober 8, 1945, Serial No.'820.-'82'1 '14 Claims. (01- 178-119) The Dresent invent on ire at s to eco i instruments or systems an i na su e t .instruments go: the telsu osraphis t n w ich a. message .to be d spatched. is written 11 011 1 LatiOD and is received .51 H ate at ,a remote location. The present gppligat qn directed m e sp emeallr to the aea a omb nation of the appa atus and to me sieiail o the transmiitine ameehamsm- A im ea ps a pl cat on .of G.W.iBaifi18S.B-M-JQ !QQQ and R. Wi l sen-No. 1620.828, filed winner 6., 1- 4 is p t cularly directed to the 516E415 of the receiv ng mechanism- Attention 8 ,59 ra i ll fil 11 P 1 YB" fl er =6, 19515.. which th re is d o os d an electrical transmitting system pymeans of which the movements .Qf a writias imp ment i the i mi ti s instrumeat ma e u d o ene aize motors which iorive a rsso d ns pen in the receiving instrument.

'The transmittin inst m nt o the pr sent invention includes a w i iii pl ment that i attached to the lowe end o a tel c pin a m- The :upper end of this am; is m unted on a gimhal arrangement tha in tum is vamounted above the oem er of the writ ng table so that the wr t n implement may b moved ,ireew n vall directions to make any type of marks desiregi. Movement of e imp ment sup orting a m is t an mit eo borough the r ses of the gimbal to an electrical tnaosmittias appa a u B ovision is made to soznnen ate for the move nt o t writing .imnienieot away in m the neuter 9 the writing table and tewassi the mi W 80 t the receivin may have true r tilinear coorgiipates.

It is an objeot 9f thepresent invention to provide .a novel telau osr e ic spnora u in w ie 1 oeiving is moved sa os a hart i exac norrespondenee with {the vrnov,ement of a transmittmg w ing i p ement vacros :a rit n u face. It is a. further object 01 the invention to provide a novel writing implem nt supporting mechanism on the transmittin apparatus o! a sys m of the type mentioned 1.50 hat th i :plement may be moved todmerent aistanoes from ported from a, point over the writing table rather ha :by an arm wh c extends inworsily 15mm on edge thereof the table is at .all timesfilear of any ob tructionsl s is further ob e t of the i l o to ov de a novel driv be ween the in s or the imbal angthe electrical tramsmittm appa etuss that movement of th im li ment diii nent distances irom its p int 0I snog-p ri l a given d re tion -wi11he translated int lin mov ment i the t ansmitt n appar tus- ,pe m ts the use at restil near vco rd nat on he r ceiving (apparatus even th u h the transmitting implement is being moved around a cent r, 7

The various features of poveltyrwhich aha-1"- sc s e invent on a poin es out with particmarity in the claims ann xed to and forming a par of his specificat on. For a bet r under- ,stand ng 0; the invention. ho ever. its advantages d specifi obie t ob a ned with its. use.- rre e n should he had to the ae ompaa ins dr w g an d s ipt ve matter i which is illustrated and sc ibed a preie m embodiment of the in t on In the drawings;

Figure 1 is ,a general view 0.! the transmitter and o the receiving instrumen Figure 2 is a top view, partly in section, .01 the transmitter.

F u e '3 is a view taken n ine &3 1 B g-- ure 2,

Figure 4 is ,a view taken on line v4- 4 .of Fig- Eig ure .5 is a. view taken or; line 5-95 of Fig.- ure 2,

(Fig 6 is a enl d iew, partly in section. of the upper en oi the s pn rtms a m q the writing implement,

Fi ure 7 is a view taken o line Ti 1 .1 Fi u e 6,, and

Fi ure 5-8 :is n e la ed vi Partly in section. o the lowe e s o e writi g implement surmx i rs arm and of the wri ng implement s p- P rt n mechan sm,

neie rin firs to F u 1 t ere i shown Is transmitting 2 winehis oma cted by a suitable sable 3 off anviensth with re ivi 4 Th tra smitting s p swi e with a writing imp em n 16 ha ma be either a e or penci and s support by an arm 6 i om a s. mb a1 a rrasement theoarts or which are mov d as the rm 5 is movedin any direction across .a table o t er wri in surface i- M ement of th a m 5 s es to operate a ea ec nce type e ctr ea tran mittin s stem 0! he Map oeseribe below so that a mark made on the chart may be seen from above through a window that is-provided in the top IU of the receiving unit. This window is shown as having on it a suitable-scale 9 whereby the marks made on the-chart maybe oriented with respect to each other. The use of this scale however, is not'n'eces'sary since'ordi nary writing or printing may be transmitted in addition to various geometricalfigures.

In Figure 1 a, portion of a. receiving instrument is broken away to shows. pen carriage I III which hasa Den, II I mountedthereon. This carriage is carried for movement in two directions respectively, byflb'ars ll z'andf I I3; The supporting bars for the "carriage'have'rollers H4 and H5 respectivelyon' their ends'which ride on tracks I I8 and jII'I thatarefprovided inthe base of the receiving instrument. Astherods II2 and'II3 areimoved, it willbe seen that the pen carriage l I;will be moved in 'any' direction beneath the chart. Ifjrod IIZonly-is moved, thecarriage wfilrbe moved in'onedire'ction only. But ifrods I [Tend I I3 arefsimultaneouslymoved; the pen carriage H0 "will be -moved 'at an angle toboth 'sidesof the instrument. Movement is imparted tothe rod I I2 by means of a motor I I8 which has 'adrive'pulley IIQattached' toit. This pulley drives a cable I2 I that passes over suitable guide pulleys atopposite'ends' of "the track H6 and which isjfastenedfioitheroller 4. In a like manner there is 'provi'deda'motor- I22'which has ja"drive pulley I23 fastened-to its shaft. 'As the pulley I 23'isrotated, itffldrives-a cable I24 that passes aroundsuitable guide pulleys at the ends of tracks II! and which'is attached to the roller H5. The motors are energized for rotation through the electrical transmission system "that isdescribed in detail; the above mentioned application injfresp'onse to movement of the "writing in'iple'rn'enti. -The transmitting unit, 2 is intendedto-be mounted on theunderside of a 'support'located directly above the writing surface. Thus the writing ir'nplement'ihasits tip placedover the center of the writing surface formed on the-table 8. Ther'fore,"'movementofthis writing implementin any direction ,across the table operates fthrOllgh "the gimbal arrangement to suitably move"the"components or the electrical transmission system.. 7 a a 7 The gimbal arrangement is composed ofgthree main parts; first, a large ring II that isprovided with suitable' stud shafts'12and I3 pivoted in bearings provided for this purpose in the frame "of the transmitter second, a'small ring that isprovided with suitable stud shaftsli-and I6 pivoted in the'frame'at right angles to and inthe'fs'ame horizontalplane as the shafts I2 and :I3,-'and third-,"a?p1ate or supporting member I1 'that isfprovided with a stud shaft I8 which is "'pivotedjinasuitable bearing I9 that is mounted "inthe center ofgsmall'ring 14. The shaft I8 is f'in thevertical'position ofring I4 coaxial with theishaftsfl and I3'thatsupport the large ring "of thejgimbal, Thelargeming is provided with J; curved track 2i on one 'faceythereof which is the same face of the ring that is located below 4 the pivots I2 and I3. These tracks are engaged respectively by rollers and 24 that are fastened to diametrically opposed points of the plate I! so that as the plate is moved, the rollers are moved 'alongthe tracks. Movement is imparted to the various partsuotthe giinbal mechanism as the arm 6 is moved by means of an arm supporting -'-member 25 that is attached by screws 26 to the face of the plate II opposite that from which sha'ft'l'il projects.

whenithelarmzi is being moved in a straight 1 -line eitheryparallel' to shafts I2 and I3 or parallel "tosh'afts "I 5 an'd:IIi, itis necessary that only ring jlir'or ring II respectively. be moved. This is use since whenthe writing implement is bein move'd in.;suchs:a' line, only one 01' the motors H8 or I 22should be energized for rotation.

-Referring to Figure 3, it will be seen that no matter whether the ring I4 is vertical in its full line position or istilted-to some -position aunt of the vertical sum as='-is--'shbwn*in dotted :l-ines,-. if "thering' M is held-still, and the:- arm: 25. moved "around shaft l 8, "the arm will move -in a straight line. As thisrnovement =occurs rollers 23 iand "24on-plate I'|=-will--tilt' ring -I'I =around its-axis on shafts Hand [3. Ii -arm 25 is in'itsfull-line j'position, there will be no movement of-rollers. 23 and' zraround their -axes. If the arm 25: is .in its: dottedline position, there :will -be a slight oscillatory movement or the rollers .along tracks 2 rand '22"due---to 'the fact -that shaft :I8 is-not -at that time coaxialwitlr-shafts I2 and I3.

Reference is-now ==madespecifically toEigure 4. "If the ring I Fis held in its :full line position "andarm- 25-is move'd, ring-H 4-wi1l=be rotated-by sh'aftl 8-around the shaf ts I5 and: I6. The rollers 23 and 24 will move along I tracks 2 I I and: 22, respectively, to guide the arm- '2 5* in a 1 straight line. In a like manner the arrn 25 will1be guided "in a straight -line-by-flring ll when: the latter is 'tilte'dtoanyangle-to the vertical -as shown, for *exam'ple, '-in-'"its dotted+ line position in Figure *4. When-ring II is-tilt'ed-and arm 25 is moved,

'there'wi'llbe a slight oscillation of plate I 1 around "its axis relative to' ri'ng il due to the fact that a'rnr 25-is -no =longerperpendicular to shafts I5 mid -I6. I "If"thearm* 6' is movedin any direction 7 other than parallel to "or perpendicular tothe-paper irrFifg'ures' 1,--3;--and 4ithe plate I! will simul- 'taneous'ly moveboth of the-gimbal' rings I I and I4 the manner *above described. This will -producesimultaneousenereization of motors I I 8 and I 22in the receiver t'o' move pen I -I I-diagonally across the chart of that instrument.

The -movement=-of thegimbal rings :as the Writing implacementis movedis -imparted" to the transmitting portion of the electrical system as a'whole. -In -this -case movement of the writeo ing implement in either direction is used to ad- "just"the -plates of oneilor the -other of a pair of e vari'able "condensers an amount corresponding to the-movement,"of =thej writing implement. "As is shown Figure -2;'-there is arcondenser. 21 that isadjusted as the small ring. I of the gimbai arrangement ":is rotated, x-This a condenser is housed in a suitable-casing that forms an integral-part ofthe-transmitting unit. A similar condenser is provided whichlisadjustedas the 7 large Zring l I: offthe :"gimbah'arrangement' is ro- 'tated. Ilatteracondenserzs.is5 adjusted 'in a '--manner identicalto th'at in which the condenser 2'l 'is adjusted and is located in ahousing-M.

"abovethe pivotsand' witha curved"track*22 on: "Each-' of the:condensers consistseofi a series or stationary plates 3I and a series of movable plates ag aosisee Iiilcatedzbetween:them.. Each of:.the statinam piatesisisisuitably mounted and insulated from the" others; The movable plates are insulated from; each other and attached. to a rotatable shafti33; This shaft is rotated by a shaft'35 through" a flexible coupling 34. Movement-is impartedzto. a rotatable shaft 33. Thiscoupling comprises aquadrant 36 which is fastened to thezshaft l6 and an eccentric 3! which is fase tenedltosthe shaft. 35. It is notedthattheaarc' of- 'the outer surface of the quadrant is notcon-c centric'with' shaft [6. Extending between the quadrant-and the eccentric are three straps, the center one of which is given reference numeral 3'8 and' the two outside ones of which aregiverr refrencenumeral 39. The strap 3Bcis fastened toithe upper portion of the segment by screws li and passes down the right, curved face-thereof aKGlIilLdi-the under side of the eccentric andis attached to the latter. by screws 42. Straps 39 are attached to the eccentric by screws 44 and pass counter-clockwise around the'same to the curved face of thequadrant and across the lower edgeith'ereof. They are attached to the quadrant bysuitablescrews t5. It is noted that aspring 43iisipr0vided to take up. any slack which may: occur inthe strap 38. This type of drive connectiondoes away entirely with lost motion betweenthe gimbal and the condensers.

Iti-is-essential that the condensers each be. so adjusted that when the writing implement 5 is imaslinel vertically belowthe center of the gimbal thatithe condensers be adjusted to their midposition'. To accomplish this the eccentric: 3T isrfirst attached to shaft of the condenser as -shown with the large radius of the eccentrich'orizontaland with shaft 35adjusted so that the condenser is in its mid-position. The seg'-. ments361zis at this time loose in its shaft. A toot shown in outline at 49 is then placed over shaft 35-and projections on the tool are placed ini1openings-5! in the eccentric and 52 in the segrements This lines up: the two parts so that seg-' men-t: 36zcanthen be tightened on its shaft l5: byi set" screws provided for that purpose. The straps 39 are then tightened by a screw which; extends ;.through a plate 41. This plate isheld in 'place by screws 45. It is notedthat the: segment is provided with a cutout portion 48 to receive the screw When the parts are properly-aligned and tightened the tool 49 is =re"-- moved and not again used untilthe par-ts require- 1 readjustment.

. The-reason for having the part 31. eccentric. inshape is tocompensate for the non-linearity. ofamovement of the arm 5 when it moves outi ofi -averticalposition. It will be seen that the, arm is moved agreater distance across 1 the;- paperfor-a given angular movement of eitherof thexgimbal rings as the arm is moved away from; the center and toward the edge of the writing; tables. Thus, for a given angular movementof; theasegment 36 when the writing implement is: near a vertical position, the eccentric, 31 will "be: moved. a small amount, whereas for the samee. angular movement of the eccentric 36, if the writingimplement is out of the vertical, the! eccentricwill be moved through a larger arch Larger movements of the pen toward the edge of the writing table for a given angular: movement of segment 36 produce largerangular move ments of the eccentric 31 and condenser plat'es' flies ithepen gets nearer the edge of the writingrtable: Thus the angular'movement of the condensenmlates :32 :corresponds:exactly to thee 66 ably; fastened to the tube:

lir'i'earl movemeritlof the wi'itingtiniplement irii'any position ofithe ila'tter on :.the.- writing tables;

The: condensersthat are: located; in housings: 2'8 and 29 are connected by suitable-fcables 53- and 1 54:1 with another housing'section -55 of the transmitter 'wherein suitable-5 electrical con-' nectlons --'are -made'v with the cable-3thatrextends toithezreceiving innit; v The..-features of electrical circuit of F-whic'h the condensers' forml an integral part arethasubject' matter of the above i men-A tionedJR; Wild case and will not be described' in detail-herein.- It is suflicient to say-that the cable- 3 may be= in anydesired length so-that' thetransmitter and receiver can be located at.

.- a distance from each"- other.

The gir'nbal ringshave movement imparted" to them by the arm B -which is attached to the lower DOItiOIIIOfSll-DDOI'ti-Iig member- 25. To this 1 end that 1 supporting member has ahole drilledin i it anda slot extending from one side to :thgrhole so that the pen i arm may be placed in thistihole and the'sides of the slot pulledt'o geth'er'bysui-table clamping screws 5 I tosecurely' fasten the arm in place on the lower end of'the support. It is n'oted -that the writing implement" 5 attached tothe lower end of= arm16 m'ay -be either aupen or a pencil.'= It -is shown herein asapencil and will be described -as such;

The arm '6 consists of a pa'ir 'of tubes; thelouter one- 0f which is designated 62-and= the inner one at w-hich -is designated 63; The innertube guided in the outer tube atits lower end by means-'of arerrule B4 that is threaded onflthelower endo'f the-outen'tube 62. The=upper end= ofrrthe tube- 63 is --guided for movement in the outer tube in a suitable mannerth'at will'now be described The upperend-ofthe tube-631s made of a thicker cross section than the lower end-as is best shown in Figure 6 and is provided with three ;long narrow slots fiithat'are spaced 'apart. Between each-of-these' slots there is shown a" short, wider slot '66. Each of the-slots 6fiz-has=athorizontalgroove 'BIcut in it. These groovesi serve to support -the shafts $9 of rollers: 68=that=are :placed in the grooves-ifi. Normally the-router surface' ofthe rollers would have adiameter slightly larger than'ith'e inside diameter of=;:the shaft'i62. V The 'slots -65, however,- permittheitube :63 to" be 'siightly 'compre'ssed I indiameter 1 so: that J-the :rollers have asnug fit within the tube 62: and the shafts 69-are held within the slots 61". Thuswhen thetubes are moved-axially with respect to 'eachother, the lower end or the inner tube :is :guided by. ferrule 64 and the upper end i of the inner tube 'is'guided bythe rolling contact betweenithe s rollers 68 and 5 theinterior of tube 62;: Preferably the"tube62 isformed with slight grooves 'lfl' in which the rollers '68 move. This prevents the tubes 62 "and 63from=rotating rela tive 'each other:

Attached to the lower end of the inner"tube is-1an assembly which supports -"the' pencil "5. To i this end a sleeve H is slipped overthe lower endof :the tube 63"u'p against a collar 12 that is 'suit-: The sleeve is held in} placefby a second ferrule 13 i that 'is threaded thec outer -surface of'the tube. This tube-has? inserted "in'itslower end-a second tube-l4whichf iriwturnhas 'inserted init abushin'g :15. The tw'o tubes andfthe'bushingare held in'assembled'relation by meansof ar pin l6 that'extends'through them. Thelower end of tube 14 has one side cut-5' away as shownlat 89: slidablymounted in' thebushings-l 5 :is 'a'shaft 'l 1 that is =no'rnially h'eld in? anaextende'di position by meansof aspringwhich surrounds the shaft and bears with one end against the bushing, and with the other end against a shoulder on-this shaft. The lower end of the shaft is cut back. as shown at 19 and is formed with an opening in its lower end through which, the writing tip of the pencil extends. Thelower end of shaft 71 is guided for movement in the tube I4 by a second bushing 8I. The pencil is held in position with its point extending through the opening in the lower end of the shaft by means of a bracket 82 that is attached to shaft TI with suitable screws 83. The brackethas a thumb screw 84 in it so that it clamps the pencil and holds it in place. This pencil may be of any suitable type but is preferably a mechanical pencil of the push type so that the point may be readily renewed as it is used up.

A handle 95 is provided bymeans of which the arm 6 and pencil may be moved across the writing surface of the table 3. This handle is frictionally held by a ball and socket joint so that it will stay in the position in which it is placed. To this end the lower end of the handle is tubular in shape and is slightly reduced in diameter, so that a ball 86 may be received therein. This ball isforced against the reduced end of the handle by a cupped member 81 and a spring 88. The handle is attached to the lower end of tube I4 by a pin 89 that extends from the ball into a bracket'QI which is fastened to the tube. The handle 85 may be rotated so that it is accessible from the front or the side of the instrument by loosening ferrule 13 and rotating the tube TI and the parts attached thereto. When handle 85 is extending in the proper direction, the ferrule is again tightened.

From the above description it will be seen that an operator of the instrument may grasp the handle 85 and hold it in a position most convenient to ,him in order to move the pencil and its supporting arm across the writing surface. It is noted that the parts are so formed that when the arm 6 is hanging free from its support on the gimbal mechanism, the tip of the pencil will be exactly below the center of the gimbal mechanism. It is necessary to have the arm 6 made extensible, since whenever the pencil is moved away from its vertical position, it will be further from the center of the gimbal arrangement than when at the center point.

order to compensate for the increased and decreased distance between the writing tip and the center of the gimbal arrangement. I

As has been mentioned above the receiving unit of the system is provided with a recording pen that works against the under side of the chart therein. Some means is, therefore, necessary in that unit to maintain the pen in engagement with the chart. This is accomplished in a manner fully set forth in the above mentioned Barnes et al. application. Since it is desirable that the.

pen in the receiver does not engage the chart therein except when the pencil tip of the transmitter is in engagement with the writing table 8, a means is provided between the two instruments which will keep the pen of the receiver out of i engagement with the chart in that unit except at such times when the point of pencil 5 is in:

Thus as. the pencil is, moved across the writing surface, the supporting arm can elongate and contract as necessary in into engagement with the writing surface. This is the reason for having the pencil holding shaft 11 slidably in the sleeve I4. Normally the shaft TI is held in extended position by means of spring 78 but when the pencil is moved into engagement with the writing surface, the force of this spring is overcome to move a contact 92 on the upper end of the shaft TI into engagement with a second contact 93 that is located within the tube H and insulated from that tube by an insulating member 94. Extending upwardly through the inner tube 63 from the contact 93 is a wire 95 whose upper end is fastened to an elongated rod 96. This rod is insulated from the rest of the structure by a tube 91 that is received in a member 98 which in turn is threaded into the upper end of the tube 63. The upper end of the rod 96 has placed over it an insulating disc 99 and a block IUI. This assembly is held in place in the sleeve 98 by a nut I02 on the upper end of the rod 96.

Since the weight of the inner tube 63 and the pencil supporting assembly on the lower end thereof is liable to be sufficiently large to make it diflicult for the person operating the instrument to use, a counterbalancing spring is used to offset this Weight and to help retract the inner tube 63 when it is to be moved up into the outer tube 62. To this end there is provided a cable I 93 that is suitably attached to the block .IIJI,

which cable extends to a spring reel I04 that is maintained under tension by a spring I05. The force exerted by this spring may be adjusted so that more or less of the arm 6 is counter-balanced the contact 93 and wire form a part. For thisv purpose the spring reel is insulated from the supporting arm 25. A wire may extend in any suitable manner from the insulated spring reel I04 through the various cables from the transmitter to the receiver. The other portion of the circuit which is closed when contact 92 engages contact 93 is formed by the instrument itself since the Contact 92 is grounded to the pencil supporting arm.

From the above it will be seen that the transmitting instrument described herein consists of a pencil which is mounted on an extensible arm that is in turn movably supported by a gimbal arrangement. Thus the pencil can be moved in any direction from a vertical position to any point on the writing surface of the table or support 8.

Any movement, no matter how slight, of the lost motion by'the gimbal to one or both of a pair of condensers that form the transmitting units of an electrical capacitance type of circuit.

While in accordance with the provisions of the statutes, we have illustrated and described the best forms of the invention now known to us, it will be apparent to those skilled in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of the invention as set forth in the appended claims, and that in some cases certain features of the invention may sometimes be used to advantage without a corresponding use of other features. 7

Having now described our invention, what we clatiniis as new and desire to secure by Letters Paten 1. In" a recording system, a transmitting stawriting tip along this table is transmitted withoutescapee surf-ace including means moved as said imple-- mentis moved, electrical transmitting means and connecting means between said means moved as said implement is moved and said electrical transmitting means to operate the latter linearly for-a non-linear movement of the former.

In a, Writing system, a transmitting station incl-iiding a flat writing surface, a writing implement-tobe' moved to any part of said surface, means to support said implement vertically over the: center point of said surface for movement around a point out of the plane of said surface, electrical transmitting means, and means to operate said transmitting means by said supporting means operative to provide linear movement of said transmitting means as said implement is moved from one edge to the opposite edge of'sai'd writing surface.

3. In a writing system, a transmitting station comprising a fiat writing surface, a writing implement to-be moved to any place on said sur face, means to supportsaid implement vertically above the center point on said surface, electrical transmitting apparatus, and means to operate said apparatus by said supporting means including' a segment member moved by said supporting means, an eccentric member connected to said apparatus, and strap means to transfer movement of said segment member to said eccentric member.

4. In a telautographic system, a transmitting station including a fiat writing surface, awriting implement to be moved to any point on said surface, means to support said implement for movement olver said surface from point vertically over the center thereof, said supporting means including a first part rotatable as said implement moves back and forth across said sur-- face in one direction, and a second part rotatable as *said implement moves back and forth across said surface in a direction at right angles to said first direction, a pair of electrical transmitting members, and a means to connect said transmit ting members to said parts respectively including means to adjust said transmitting members linearly as the part attached thereto is rotated. due to movement of said implement from the center of said writing surface to an edge thereof.

5. In a, recording system, a writing surface, a writing implement to be moved over said surface, an arm suspended vertically above said surface, a holder attached to and extending below said arm, a member slidably received in said holder and having an opening in the lower end thereof, means to fasten detachably said implement in said member with the writing tin thereof extending through said opening and coaxial with said arm, means to maintain normally saidmember in an extended position with a biasing force, and a handle attached to said holder by means of which said arm may be moved to bring said implement into engagement with said' writing surface, said engagement forcing said member against its bias in said holder.

6. In a recording system, a writing implement, means to hold said implement in position for writing therewith comprising an arm, a holder in said opening, means to attach said implement to said member with the writing tip of said implement extending through the opening in said holder, means to bias normally said member toward said opening, a handle attached to said holder by means of which said arm may be moved, and contacts forming part of an electric circuit carried respectively by said holder and said member, said contacts being opened when said member is moved. under its biasing means and closed when said implement is moved to writing position.

7; In a recording system, a writing surface, a writing implement to be moved over said surface, and'm'eans tosupport said implement above said surface for movement thereover including an arm, a member projecting from said arm and having an opening in the end 'ther'eof'to receive the writing tip or said implement, means to hold said implement in said member at an angle thereto with the tip of said implement coaxial with said arm, and a part mounted on said memher for universal li-lbvilieht relative thereto whereb said arm and implement may be moved across said surface.

8. In a recording system, a writing implement. means to mount said implement for movement over a, writing surface, a part rotated as said implement is moved, an electrical transmitting apparatus, means to drive said apparatus by said part comprising a segment shaped member, a cam member attached to said apparatus, straps attached at one end to said segment and at their other end to said cam memberto transefer movement of the former to the latter, and means to adjust some of said straps to vary the initial re ation between said eccentric and saidcam member.

9; In" a recording system, a writing surface, a writing implement to be moved over said writing surface, and means to support said implement comprising a telescoping arm including a plurality of tubular parts, cooperating means on said parts to maintain the said parts concentric to each other, means to attach said writing implement to one of said parts in such a manner that the writing tip thereof is concentric with said part, means to mount the other of said parts for universal movement whereby said writing implement may be moved to any point over said writing surface, and means to act normally to counterbalance said writing implement and the said part upon which it is mounted.

10. In a recording system, a writing surface, a writing implement to be moved over said surface, a pivotal support, a, telescoping arm comprising a plurality of parts and having one part attached to said support, means to attach said writing implement to another part of said arm with the writing tip of said implement coaxial with said arm, resilient means to maintain normally the parts of said arm in telescoped relation, and means to adjust said resilient means so that it exerts a force sufficient to substantially counterbalance the weight of said implement and the part of said arm attached thereto.

11. In a recording system, a writing surface, a writing implement to be moved in any direction across said surface, means to mount said implement for said movement including a support mounted vertically over said writing surface, a first ring pivoted to said support for movement around an axis, a disc pivoted coaxially of said ring and at right angles to said first mentioned axis, connecting means between said disc and said implement, a second ring surrounding said first ring, means to pivot said second ring to said sup- 1 1 port on an axis at right angles tosaid first mentioned axis and concentric with the axis of said disc, and means carried by said disc to move said second ring as said disc is moved around its own was 7 12. In a writing system, a writing implement, means to mount said implement for universal movement including a support, a first ring, means to pivot said first ring to said support for movement around a horizontal axis, a second ring received by said first ring, means to pivot said second ring in said support for movement around a second horizontal axis at right angles to said first axis, a disc carried by said second ring and pivotally mounted coaxial thereof, means carried by said disc and engaging said first ring at spaced points, and means to'attach said implement to said disc. r 13. In a recording system, a transmitting station having a fiat writing surface, a writing implement-means to mount said writing implement for movement around a point above the center of the writing surface with which it cooperates whereby difierent angular movements of said mounting means are necessary to move said writing implement the same distance along its writing surface as it moves outwardly from the center thereof, electrical transmitting means operative to energize said electrical drive means, and connecting means betweensaid means to mount and said electrical transmitting means to move the latter equal increments forequal increments of linear movement of said writing implement.

14. In a recording system, a transmitting station having a fiat writing surface, a writing implement, means including a gimbal arrangement to support said writing implement for movement in any direction about a point above the center of said writing surface whereby equal linear movementsof said writing implement along said writing surface will produce unequal angular movements of said gimbal arrangement as said writing implement is moved different distances from the center of said writing surface, a first transmitting device to be moved as said writing implement is moved in one direction, a second transmitting device to be moved as said writing implement is moved in a direction at an angle to said first direction, and drive means between said gimbal arrangement and said transmitting devices to impart equal movements to said transmitting devices as said writing implement is moved equal distances across said writing surface.

GEORGE W. BARNES, Ja. JOHN F. GOETZ. WALTER P. WILLS.

REFERENCES crran The following references are of record in the file of this patent:

UNITED STATES PATENTS Germany Sept. 10, 1914 

